Quantification of methylated DNA by HeavyMethyl duplex PCR

Area of Science:

• Molecular Biology
• Genetics
• Biochemistry

Background:

• DNA methylation analysis is crucial for understanding gene regulation and disease.
• Existing methods may have limitations in terms of sample type versatility and quantification.
• The GSTP1 gene is a significant biomarker in prostate cancer.

Purpose of the Study:

• To present a protocol for the HeavyMethyl (HM) assay for DNA methylation analysis.
• To detail a duplex real-time PCR assay for GSTP1 exon1 methylation status in prostate tissues.
• To describe the preparation and analysis of a combined HM GSTP1 Exon1 and reference assay.

Main Methods:

• Utilized the HeavyMethyl (HM) assay, a real-time PCR technique.
• Employed a methylation-specific oligonucleotide blocker and probe for targeted amplification.
• Developed a duplex real-time PCR protocol for simultaneous analysis of GSTP1 exon1 methylation and a reference assay.

Main Results:

• The HM assay demonstrated suitability for qualitative and quantitative DNA methylation analysis.
• The assay is effective across diverse sample types including fresh, frozen, FFPE tissues, serum, plasma, and urine.
• A specific protocol for analyzing GSTP1 exon1 methylation in prostate tissue was successfully developed.

Conclusions:

• The HeavyMethyl assay provides a versatile and accurate method for DNA methylation analysis.
• The developed duplex real-time PCR protocol is effective for assessing GSTP1 exon1 methylation status in prostate cancer research.
• This assay facilitates robust methylation analysis in various biological samples.